Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Medium-entropy rare earth tantalate ceramic as well as preparation method and application thereof
The invention discloses medium-entropy rare earth tantalate ceramic as well as a preparation method and application thereof. The chemical formula of the medium-entropy rare earth tantalate ceramic is Y < 1-x >/2Ta < 1-x >/2M < x > O < 4 >, wherein X is more than 0 and less than 0.8, M is Ti, Hf and Zr, and the molar content of each element in M is equal. The preparation method comprises the following steps: weighing corresponding Y2O3 powder, Ta2O5 powder, HfO2 powder, TiO2 powder and ZrO2 powder, adding a solvent, mixing, carrying out ball milling by adopting a planetary ball mill, sieving, compacting in a mold, and sintering. The medium-entropy rare earth tantalate ceramic provided by the invention is simple in raw material component, relatively low in heat conductivity at high temperature, good in heat insulation performance and relatively high in thermal expansion coefficient at high temperature, so that when the powder of the medium-entropy rare earth tantalate ceramic is used as a thermal barrier coating, the expansion stress between the powder and a base material (or a bonding layer) is reduced, and cracks are reduced. In addition, due to the excellent fracture toughness, the coating can well resist external impact during service, and the coating has wide application prospects in the aspect of aero-engine hot end component surface coatings.
本发明公开了一种中熵稀土钽酸盐陶瓷及其制备方法与应用。所述所述中熵稀土钽酸盐陶瓷化学式为Y1‑x/2Ta1‑x/2MxO4；其中，0＜X＜0.8，M为Ti、Hf、Zr，M中各元素的摩尔含量相等。其制备方法为称取相应的Y2O3粉末、Ta2O5粉末、HfO2粉末、TiO2粉末和ZrO2粉末，加入溶剂混合，采用行星球磨机进行球磨，过筛，再在模具内压实后进行烧结即得。本发明提供的中熵稀土钽酸盐陶瓷原料成分简单，其在高温下的热导率较低，表现出良好的隔热性能，同时在高温下热膨胀系数较高，使得其粉体作为热障涂层时，与基体材料（或粘接层）的膨胀应力减小，减少开裂。另外，其优异的断裂韧性使得其在服役时能够很好的抗外来冲击，在航空发动机热端部件表面涂层方面具有广阔的应用前景。
Medium-entropy rare earth tantalate ceramic as well as preparation method and application thereof
The invention discloses medium-entropy rare earth tantalate ceramic as well as a preparation method and application thereof. The chemical formula of the medium-entropy rare earth tantalate ceramic is Y < 1-x >/2Ta < 1-x >/2M < x > O < 4 >, wherein X is more than 0 and less than 0.8, M is Ti, Hf and Zr, and the molar content of each element in M is equal. The preparation method comprises the following steps: weighing corresponding Y2O3 powder, Ta2O5 powder, HfO2 powder, TiO2 powder and ZrO2 powder, adding a solvent, mixing, carrying out ball milling by adopting a planetary ball mill, sieving, compacting in a mold, and sintering. The medium-entropy rare earth tantalate ceramic provided by the invention is simple in raw material component, relatively low in heat conductivity at high temperature, good in heat insulation performance and relatively high in thermal expansion coefficient at high temperature, so that when the powder of the medium-entropy rare earth tantalate ceramic is used as a thermal barrier coating, the expansion stress between the powder and a base material (or a bonding layer) is reduced, and cracks are reduced. In addition, due to the excellent fracture toughness, the coating can well resist external impact during service, and the coating has wide application prospects in the aspect of aero-engine hot end component surface coatings.
本发明公开了一种中熵稀土钽酸盐陶瓷及其制备方法与应用。所述所述中熵稀土钽酸盐陶瓷化学式为Y1‑x/2Ta1‑x/2MxO4；其中，0＜X＜0.8，M为Ti、Hf、Zr，M中各元素的摩尔含量相等。其制备方法为称取相应的Y2O3粉末、Ta2O5粉末、HfO2粉末、TiO2粉末和ZrO2粉末，加入溶剂混合，采用行星球磨机进行球磨，过筛，再在模具内压实后进行烧结即得。本发明提供的中熵稀土钽酸盐陶瓷原料成分简单，其在高温下的热导率较低，表现出良好的隔热性能，同时在高温下热膨胀系数较高，使得其粉体作为热障涂层时，与基体材料（或粘接层）的膨胀应力减小，减少开裂。另外，其优异的断裂韧性使得其在服役时能够很好的抗外来冲击，在航空发动机热端部件表面涂层方面具有广阔的应用前景。
Medium-entropy rare earth tantalate ceramic as well as preparation method and application thereof
一种中熵稀土钽酸盐陶瓷及其制备方法与应用
FENG JING (Autor:in) / CHEN XUNLEI (Autor:in) / CHEN LIN (Autor:in) / TIAN JIANG (Autor:in)
03.12.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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